general_fact: 20194 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 20194 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 20194 is a boring number.
historical_date: April 15th is the day in 1989 that Upon Hu Yaobang's death, the Tiananmen Square protests of 1989 begin in the People's Republic of China.